What is so-called latex ink? In HP’s case, its viscous latex inks are pigmented, water-based inks using aqueous-dispersed polymer (“latex”) technology. In addition to being odorless, they have very low levels of volatile organic compounds (VOCs). Latex inks are ideally suited for wide and super-wide applications, including event banners, transit signage, and other outdoor applications as well as for high-quality indoor signage, according to HP